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Round and Adjust Multiplication Worksheet

Tables & multiplication lesson 16: Round and adjust · Set 532 · 40 questions
TalentJR

How it works (Round and adjust): Round up: 49 is 50 − 1, 98 is 100 − 2. Multiply by the round number. Take away the number times the bit you added.

NameDateTime takenScore ___ / 40
  1. 1.13 × 98 =
  2. 2.8 × 98 =
  3. 3.12 × 9 =
  4. 4.6 × 9 =
  5. 5.8 × 19 =
  6. 6.3 × 29 =
  7. 7.15 × 29 =
  8. 8.3 × 9 =
  9. 9.6 × 49 =
  10. 10.14 × 9 =
  11. 11.11 × 29 =
  12. 12.6 × 9 =
  13. 13.5 × 9 =
  14. 14.10 × 49 =
  15. 15.12 × 9 =
  16. 16.10 × 99 =
  17. 17.6 × 49 =
  18. 18.14 × 49 =
  19. 19.40 × 99 =
  20. 20.6 × 19 =
  21. 21.14 × 99 =
  22. 22.5 × 19 =
  23. 23.3 × 9 =
  24. 24.10 × 9 =
  25. 25.10 × 98 =
  26. 26.7 × 98 =
  27. 27.14 × 9 =
  28. 28.5 × 19 =
  29. 29.13 × 29 =
  30. 30.3 × 49 =
  31. 31.6 × 98 =
  32. 32.3 × 49 =
  33. 33.6 × 49 =
  34. 34.10 × 9 =
  35. 35.9 × 29 =
  36. 36.5 × 19 =
  37. 37.12 × 49 =
  38. 38.26 × 98 =
  39. 39.15 × 19 =
  40. 40.15 × 29 =

Answer key

  1. 1274
  2. 784
  3. 108
  4. 54
  5. 152
  6. 87
  7. 435
  8. 27
  9. 294
  10. 126
  11. 319
  12. 54
  13. 45
  14. 490
  15. 108
  16. 990
  17. 294
  18. 686
  19. 3960
  20. 114
  21. 1386
  22. 95
  23. 27
  24. 90
  25. 980
  26. 686
  27. 126
  28. 95
  29. 377
  30. 147
  31. 588
  32. 147
  33. 294
  34. 90
  35. 261
  36. 95
  37. 588
  38. 2548
  39. 285
  40. 435

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